package com.sunfusheng.marqueeview;

import android.content.Context;
import android.content.res.TypedArray;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.View;
import android.view.ViewTreeObserver;
import android.view.View.OnClickListener;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.TextView;
import android.widget.ViewFlipper;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by sunfusheng on 16/5/31.
 */
public class MarqueeView extends ViewFlipper {

	private Context mContext;
	private List<String> notices;
	private boolean isSetAnimDuration = false;

	private int interval = 2000;
	private int animDuration = 500;
	private int textSize = 14;
	private int textColor = 0xffffffff;

	// 加点击事件
	private OnItemClickListener onItemClickListener;

	public MarqueeView(Context context, AttributeSet attrs) {
		super(context, attrs);
		init(context, attrs, 0);
	}

	private void init(Context context, AttributeSet attrs, int defStyleAttr) {
		this.mContext = context;
		if (notices == null) {
			notices = new ArrayList<String>();
		}

		TypedArray typedArray = getContext().obtainStyledAttributes(attrs,
				R.styleable.MarqueeViewStyle, defStyleAttr, 0);
		interval = typedArray.getInteger(
				R.styleable.MarqueeViewStyle_mvInterval, interval);
		isSetAnimDuration = typedArray
				.hasValue(R.styleable.MarqueeViewStyle_mvAnimDuration);
		animDuration = typedArray.getInteger(
				R.styleable.MarqueeViewStyle_mvAnimDuration, animDuration);
		if (typedArray.hasValue(R.styleable.MarqueeViewStyle_mvTextSize)) {
			textSize = (int) typedArray.getDimension(
					R.styleable.MarqueeViewStyle_mvTextSize, textSize);
			textSize = DisplayUtil.px2sp(mContext, textSize);
		}
		textColor = typedArray.getColor(
				R.styleable.MarqueeViewStyle_mvTextColor, textColor);
		typedArray.recycle();

		setFlipInterval(interval);

		Animation animIn = AnimationUtils.loadAnimation(mContext,
				R.anim.anim_marquee_in);
		if (isSetAnimDuration)
			animIn.setDuration(animDuration);
		setInAnimation(animIn);

		Animation animOut = AnimationUtils.loadAnimation(mContext,
				R.anim.anim_marquee_out);
		if (isSetAnimDuration)
			animOut.setDuration(animDuration);
		setOutAnimation(animOut);
	}

	// 根据公告字符串启动轮播
	public void startWithText(final String notice) {
		if (TextUtils.isEmpty(notice))
			return;
		getViewTreeObserver().addOnGlobalLayoutListener(
				new ViewTreeObserver.OnGlobalLayoutListener() {
					@Override
					public void onGlobalLayout() {
						getViewTreeObserver()
								.removeGlobalOnLayoutListener(this);
						startWithFixedWidth(notice, getWidth());
					}
				});
	}

	// 根据公告字符串列表启动轮播
	public void startWithList(List<String> notices) {
		setNotices(notices);
		start();
	}

	// 根据宽度和公告字符串启动轮播
	private void startWithFixedWidth(String notice, int width) {
		int noticeLength = notice.length();
		int dpW = DisplayUtil.px2dip(mContext, width);
		int limit = dpW / textSize;
		if (dpW == 0) {
			throw new RuntimeException("Please set MarqueeView width !");
		}

		if (noticeLength <= limit) {
			notices.add(notice);
		} else {
			int size = noticeLength / limit
					+ (noticeLength % limit != 0 ? 1 : 0);
			for (int i = 0; i < size; i++) {
				int startIndex = i * limit;
				int endIndex = ((i + 1) * limit >= noticeLength ? noticeLength
						: (i + 1) * limit);
				notices.add(notice.substring(startIndex, endIndex));
			}
		}
		start();
	}

	// 启动轮播
	public boolean start() {
		if (notices == null || notices.size() == 0)
			return false;
		removeAllViews();
		// for (String notice:notices) {
		// addView(createTextView(notice));
		// }
		for (int i = 0; i < notices.size(); i++) {
			final TextView textView = createTextView(notices.get(i));
			final int finalI = i;
			textView.setOnClickListener(new OnClickListener() {
				@Override
				public void onClick(View v) {
					if (onItemClickListener != null) {
						onItemClickListener.onItemClick(finalI, textView);
					}
				}
			});
			addView(textView);
		}
		if (notices.size() > 1) {
			startFlipping();
		}
		return true;
	}

	// 创建ViewFlipper下的TextView
	private TextView createTextView(String text) {
		TextView tv = new TextView(mContext);
		tv.setGravity(Gravity.LEFT | Gravity.CENTER_VERTICAL);
		tv.setText(text);
		tv.setTextColor(textColor);
		tv.setTextSize(textSize);
		return tv;
	}

	public List<String> getNotices() {
		return notices;
	}

	public void setNotices(List<String> notices) {
		this.notices = notices;
	}

	public void setOnItemClickListener(OnItemClickListener onItemClickListener) {
		this.onItemClickListener = onItemClickListener;
	}

	public interface OnItemClickListener {
		void onItemClick(int position, TextView textView);
	}

}
